Processing » Compression Molding

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Overview

Compression molding presses form thermoset, rubber, or composite parts by placing material into a heated mold and closing the press to shape and cure. Machines range from small lab units to large hydraulic presses for automotive and industrial production. They offer precise control of temperature, pressure and cure time for thick, complex or high-strength parts, and are common for rubber components, reinforced plastics and electrical insulators.

FAQ

What specs should I check when buying a used compression molding press?

Check tonnage, platen size and daylight, stroke, hydraulic condition, heater zones and control type, electrical requirements, age, maintenance records, and any signs of leaks or platen wear. Verify mold compatibility and available tooling fixtures.

How do I estimate shipping and rigging for a compression press?

Estimate by machine weight, dimensions, and need to disassemble. Include crane or forklift, heavy-duty flatbed, permits, and on-site rigging labor. Get quotes from transporters experienced with presses and plan for careful lifting points and skid protection.

Can I inspect a press remotely before buying?

Yes, but request detailed photos and videos: startup, hydraulic pressure readings, heater operation, platen surfaces, electrical panel, and a full cycle run if possible. Ask for maintenance logs and recent service records.

What routine maintenance keeps a compression press reliable?

Regular hydraulic fluid and filter changes, check and replace seals, inspect heater bands and thermocouples, keep platen faces clean and aligned, tighten fasteners, and test safety interlocks. Follow manufacturer service intervals for pumps and controls.

Are spare parts and tooling easy to source?

Common parts like seals, pumps, heaters and controls are usually available, but availability depends on brand and age. Custom molds and tooling take time to reproduce—confirm suppliers and spare inventories before purchase.